1) The scale of PMMC type instruments is
a. Uniform
b. Non - uniform
c. Cramped at the lower ends
d. Crowded in the middle
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Answer
Explanation
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ANSWER: Uniform
Explanation:
No explanation is available for this question!
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2) A moving iron instrument is used as an ammeter. Its range can be extended by using
a. Suitable shunt across its terminal
b. A high non - inductive resistance
c. Either (a) or (b)
d. Neither (a) nor (b)
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Answer
Explanation
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ANSWER: Suitable shunt across its terminal
Explanation:
No explanation is available for this question!
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3) In a permanent magnet moving coil instrument, the deflecting torque is
a. Directly proportional to both number of turns and flux density
b. Directly proportional to the number of turns and inversely proportional to the flux density
c. Inversely proportional to the number of turns and directly proportional to the flux density
d. Inversely proportional to both number of turns and flux density
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Answer
Explanation
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ANSWER: Directly proportional to both number of turns and flux density
Explanation:
No explanation is available for this question!
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4) The indicating instruments with linear scale is
a. PMMC
b. Electrostatic instrument
c. Dynamometer instrument
d. Thermocouple instrument
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Answer
Explanation
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ANSWER: PMMC
Explanation:
No explanation is available for this question!
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5) The resistance potential divider method and capacitance potential divider method is used for
a. Both AC and DC
b. Former method can be used for both AC and DC and the later method can be used only for AC
c. Former method can be used for AC only and the later method can be used for both AC and DC
d. Former method can be used for DC only and the later method can be used only for AC
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Answer
Explanation
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ANSWER: Former method can be used for both AC and DC and the later method can be used only for AC
Explanation:
No explanation is available for this question!
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6) The range of electrostatic voltmeter can be extended by using
a. Resistance potential divider method
b. Capacitance potential divider method
c. Both (a) and (b)
d. None of these
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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7) The multiplying factor of electrostatic voltmeters is given by
a. ( C + C v ) / C
b. ( C + C v ) / C v
c. C / ( C + C v )
d. C v / ( C + C v )
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Answer
Explanation
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ANSWER: ( C + C v ) / C
Explanation:
No explanation is available for this question!
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8) In electrostatic instruments iron is not used for construction. These instruments are
a. Free from hysteresis and eddy current losses
b. Free from temperature errors
c. Dependent on temperature errors
d. Both (a) and (b)
e. None of the above
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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9) If an electrostatic voltmeter is used on AC circuit and has non uniform waves, then it will read
a. Average values
b. RMS values
c. Peak values
d. All of these
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Answer
Explanation
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ANSWER: RMS values
Explanation:
No explanation is available for this question!
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10) Electrostatic voltmeter instruments are suitable for
a. AC work only
b. DC work only
c. Both AC and DC work
d. None of these
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Answer
Explanation
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ANSWER: Both AC and DC work
Explanation:
No explanation is available for this question!
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